Organ pipe

“ An organ pipe is a tube in which a current of air passing over the edge of a piece of metal causes it to vibrate, thus putting into motion the column of air in the pipe which then produces a note. The operating air is forced across the sounding piece of metal from a bellows. ”

“ And there, behind one of the gables, partly protected from the weather, he came upon a long metal organ pipe laid flat, and near it a large funnel-shaped object. A strong breeze was blowing from the south-west, but the organ pipe gave forth no sound. ”

“ One of the best methods of judging of the colour of the blood, consists as I have often said, in fixing a tube with a stop-cock to the trachea. By this, the influx of air into the lungs, may be regulated or altogether stopped. By this, we may distend the organ, or entirely evacuate it; it gives us also the facility of introducing whatever gas we please. The animal breathes very well by such pipe when it is open, and would live with it for a considerable length of time without any very great alteration in its functions. ”

“ The next step would be to combine a set of flutes or shepherd's pipes with the wind reservoir of the bagpipes, placing a little slider under the mouthpiece of each pipe which could be opened or closed at will, so that they would not all speak at once. Then some genius steadied the wind pressure by pumping air into a reservoir partly filled with water. This was the so-called "hydraulic organ," which name has given rise to the impression that the pipes were played by the water passing through them—which is impossible. ”

“ Hope-Jones makes a stop which he calls Gravissima, 64-ft. Resultant, in his large organs. Many contend that this system produces better results than if pipes of the actual lengths of 32 or 64 feet were employed. Indeed, a pipe 64 feet long would be inaudible; the human ear has its limitations and refuses to recognize tone lower than 32 feet (just as we cannot lift water by a suction pump over 32 feet) —but, these great pipes produce harmonics which wonderfully reinforce the tone of the organ. ”

“ On placing one end of it fitted with a socket into one of the holes in the wind-chest (in place of a pipe) and admitting the wind from the bellows the water is forced up the tube, and the difference between the level of the surface of the water in the two legs of the tube is measured in inches. Thus, we always talk of the pressure of wind in an organ as being so many inches.
[4] The organ in Great Homer Street Wesleyan Chapel, Liverpool, England, had manuals extending down to CCC. It was built for a man who could not play the pedals and thus obtained 16 ft. tone from the keys. ”

“ In the French Mustel reed organ the first touch is operated by depressing the keys about a sixteenth part of an inch. This produces a soft sound. A louder and different tone is elicited upon pushing the key further down. In the pipe organ the double touch is differently arranged. The first touch is the ordinary touch. Upon exerting a much heavier pressure upon the key it will suddenly fall into the second touch (about one-eighth of an inch deep) and will then cause an augmentation of the tone by making other pipes speak. ”

“ It is an admirable makeshift where a builder is cramped for room.
Organ pipes are divided into three families—Flues, Reeds and Diaphones. The flues are subdivided into Diapasons, Flutes, and Strings, and we now proceed to consider each of these groups separately.
DIAPASONS.
The pipes usually seen in the front of an organ belong to the Great organ Open Diapason, long regarded as the foundation tone of the instrument. The Open Diapason may vary in size (or scale) from 9 inches diameter at CC to 3 inches. The average size is about 6 inches. ”

“ I remember one incident which bears upon this part of the treatise. The gentleman who gave it to me had asked to see my tobacco-pipe; he examined it carefully, and when he came to the little protuberance at the bottom of the bowl he seemed much delighted, and exclaimed that it must be rudimentary. I asked him what he meant.
“Sir,” he answered, “this organ is identical with the rim at the bottom of a cup; it is but another form of the same function. Its purpose must have been to keep the heat of the pipe from marking the table upon which it rested. ”

“ It is curious to notice how our body is wrapped in membrane. On the outside, is the skin protecting from exterior injury, and, on the inside, is the mucous membrane reaching from the lips to the innermost air cell of the lungs. Every organ is enveloped in its membrane. Every bone has its sheath. Every socket is lined. Even the separate fibers of muscles have their covering tissue. The brain and the spinal cord are triply wrapped, while the eye is only a membranous globe filled with fluid. ”

“ The lungs appeared in a normal state. The stomach contained about forty grammes of a thick, yellow, slimy liquid; and here and there parts of the mucous membrane were inflamed. The œsophagus, the intestines, the liver, the spleen, and the kidneys, were in a normal state. The epithelium was easily detached from the tongue; the base of this organ was red and slightly excoriated. The brain was more injected than its enveloping membranes; the pons varolii was the same as in the second experiment.
Fourth Experiment.—I applied on the eye of a dog of moderate size one drop of nicotine ”

“ When the instrument is in use, the kidney lies between two delicate, exceedingly flexible membranes, which apply themselves closely to its surface and to the surface of the structures entering the hilus of the organ, and each of these membranes forms with each of the symmetrical halves of the box a chamber which is filled with oil and which communicates by a relatively wide flexible tube with the recording instrument. ”

“ Not only the cavity of the cells is full, but the organ is also much dilated. I have often had occasion to open those who have died of pneumonia, in whom one of the lungs was entirely sound; now, the disproportion of weight between it and the affected one, was incomparably greater than that between an inflamed kidney and a sound one.
This phenomenon evidently arises from the fact, that the lungs alone receive as much blood as the whole body, so that when an inflammation of this viscus interrupts the course of the fluids, a very great quantity of them can accumulate there in a given time. ”

“ The writer is not aware who first introduced into the organ a rank of soft-toned pipes purposely tuned a trifle sharp or flat to the normal pitch of the organ, so as to cause a beat or wave in the tone. Fifty years ago such stops were sparingly used and many organists condemned their employment altogether. Stops of the kind were hardly ever found in small organs and the largest instruments seldom contained more than one. ”

“ We have seen, then, fine injections pour out upon the serous membranes, upon the pericardium, the pleura, the peritoneum, &c. transude upon the mucous surfaces, even upon the skin. We have seen them flow through the ureters, the pancreatic, biliary, salivary ducts, &c. Haller, in the article upon each organ, has not failed to relate examples of this sort, which prove the communication of the arteries with all the other vessels, by means of the capillary net-work. What anatomist has not sometimes made even coarse injections return by the veins? ”

“ Their number, at the first view, appears very considerable; for the organs within which they are reflected are numerous. [2] The stomach, bladder, urethra, uterus, ureters, the intestines, &c., borrow from these membranes a part of their structure: nevertheless, if it be considered, that they are continuous throughout, that everywhere they are observed to be extended from one organ to others, arising, as they did at first, from the skin, their number will appear to be singularly limited. ”

“ You will be sensible that it is raising itself up at its labor, at every stroke, so determined is the exertion of its strength. The supply-pipes are termed arteries. One large arterial pipe comes out from the heart, and then sends out branches in all directions, very much like the water-pipes sent out from the great reservoir into all the houses of a town. The branch-pipes get smaller and smaller as they go from the main, until at last they are many times smaller than the smallest hair. ”

“ Removal of the clamp and raising and lowering the bottle thoroughly irrigates the pleural cavity. This being accomplished, the patient holding his breath in expiration, and the clamp again applied, the irrigating bottle is removed, and a short hard rubber tube connected to the outer end of the drainage tube. This hard rubber tube has a soft rubber diaphragm which acts as a check valve, effectually preventing the ingress of air during inspiration, but in no wise interfering with the egress of fluid from the pleural cavity during expiration, fits of coughing, etc. ”

“ Thus heart trouble, lung disease, brain, liver, womb, tumors of the abdomen and through the list of ef [Pg 125] fects can be traced to the diaphragm as the cause.
I am strongly impressed that the diaphragm has much to do in keeping all the machinery and organs of life in a healthy condition, and will try and give some of the reasons why, as I now understand them. First, it is found to be wisely located just below the heart and lungs; one being the engine of the blood, and the other is the engine of the air. ”

“ First, other congeries of glands occupy but a particular part of the system, or constitute a particular organ, as the liver, or kidneys; but those glands, which secrete the mucus, and perspirable matter, which are called capillaries, are of very great extent; they receive the blood from the arteries, separate from it the mucus, which lines every cell, and covers every cavity of body; and the perspirable matter, which softens and lubricates the whole surface of the skin, and the more extensive surface of the air-vessels, which compose the lungs. ”

“ Harden the latter in Müller’s fluid, decalcify adult specimens in chromic and nitric fluid. Specimens of ciliated epithelium, &c., will be obtained from the lower part, and of the special olfactory epithelium from the upper part. Stain in eosine and hæmatoxyline.
Lungs.—Carefully remove the lungs of a cat without injuring the bronchi or trachea. Introduce a cannula into the trachea and gently inflate the trachea with air. Ligature the trachea and place the lung in Müller’s fluid, a weight being attached to keep the organ submerged. ”

“ We can judge of the nature of the fluid, whether it be serum, pus, or blood. The minuteness of the needle is a great cause of safety, because it allows the fluid to flow so gradually that the lung has time to expand slowly. We can in an instant arrest the flow of the fluid by turning the stopcock, and if necessary by drawing out the needle. By giving the needle a downward direction after it [p. 596] enters the cavity, we prevent the point from pricking the lung. So small an orifice is made that even if the needle does touch the lung, there is no danger, for the orifice closes over at once. ”

“ If the air enters the pleura and takes the place of the pus, the chest remains enlarged. Indeed, it sometimes increases in size to such an extent as to cause suffocation unless the pus and gas are withdrawn. The valve made by the false membrane allowing the air to enter the cavity, but not to escape from it, causes the fluid to accumulate rapidly, and we have pneumothorax to a very painful degree. The diaphragm is pushed down, and, if the disease is on the right side, the liver is forced down, and descends to a level with the umbilicus. ”

“ A young rabbit, rather more than half-grown, was made insensible by breathing air charged with four per cent. of vapour of chloroform in a large jar. The trachea was then opened, and a tube was introduced and tied. The lungs and heart were then exposed, by making an incision and removing the lower half of the sternum, with the adjoining part of the cartilages of the ribs on each side. The front of the pericardium was also cut away, to expose the heart. Whilst these operations were performed, artificial respiration was kept up by means of a bladder of air attached to the tube in the trachea. ”

“ To satisfy this greed, it will absorb moisture from the tissues with which it comes in contact, as well as from their lubricating juices. The enlargement of the blood vessels and their permanent congestion must interfere with the filtering action of the membrane. In time, all the membranes become dry, thickened, and hardened; they then shrink upon the sensitive nerve, or stiffen the joint, or enfeeble the muscle. The function of these membranes being deranged, they will not furnish the organs with perfected material, and the clogged pores will no longer filter their natural fluids. ”

“ If intense abdominal fermentation exists, relieve the accumulated gas with trocar, aspirate as much serous matter as possible from the pelvic cavity, introduce a strong fluid into the cavity, taking care to have as much of this fluid reach the cavities of the intestines as possible. Open one of the arteries commonly used in one of the drainage processes and inject 64 ounces of half strength fluid, draining blood from the vein simultaneously with the injection. Then inject a sufficient quantity of normal fluid to complete preservation. Close all openings of the body with absorbent cotton. ”

“ The use of Swell boxes of this vastly increased efficiency permits the employment of larger scales and heavier pressures for the pipes than could otherwise be used, and enormously increases the tonal flexibility of the organ.
It also does away with the need for soft stops in an organ, thus securing considerable economy. Where all the stops are inclosed in cement chambers (as in the case of recent Hope-Jones organs) and where the sound-trap shutters are employed, every stop is potentially a soft stop. ”